/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.jca.cci.object;
import java.io.IOException;
import javax.resource.cci.ConnectionFactory;
import javax.resource.cci.InteractionSpec;
import javax.resource.cci.Record;
import javax.resource.cci.RecordFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.DataRetrievalFailureException;
import org.springframework.jca.cci.core.support.CommAreaRecord;
/**
* EIS operation object for access to COMMAREA records.
* Subclass of the generic MappingRecordOperation class.
*
* @author Thierry Templier
* @since 1.2
*/
public abstract class MappingCommAreaOperation extends MappingRecordOperation {
/**
* Create a new MappingCommAreaQuery.
* @see #setConnectionFactory
* @see #setInteractionSpec
*/
public MappingCommAreaOperation() {
}
/**
* Create a new MappingCommAreaQuery.
* @param connectionFactory ConnectionFactory to use to obtain connections
* @param interactionSpec specification to configure the interaction
*/
public MappingCommAreaOperation(ConnectionFactory connectionFactory, InteractionSpec interactionSpec) {
super(connectionFactory, interactionSpec);
}
@Override
protected final Record createInputRecord(RecordFactory recordFactory, Object inObject) {
try {
return new CommAreaRecord(objectToBytes(inObject));
}
catch (IOException ex) {
throw new DataRetrievalFailureException("I/O exception during bytes conversion", ex);
}
}
@Override
protected final Object extractOutputData(Record record) throws DataAccessException {
CommAreaRecord commAreaRecord = (CommAreaRecord) record;
try {
return bytesToObject(commAreaRecord.toByteArray());
}
catch (IOException ex) {
throw new DataRetrievalFailureException("I/O exception during bytes conversion", ex);
}
}
/**
* Method used to convert an object into COMMAREA bytes.
* @param inObject the input data
* @return the COMMAREA's bytes
* @throws IOException if thrown by I/O methods
* @throws DataAccessException if conversion failed
*/
protected abstract byte[] objectToBytes(Object inObject) throws IOException, DataAccessException;
/**
* Method used to convert the COMMAREA's bytes to an object.
* @param bytes the COMMAREA's bytes
* @return the output data
* @throws IOException if thrown by I/O methods
* @throws DataAccessException if conversion failed
*/
protected abstract Object bytesToObject(byte[] bytes) throws IOException, DataAccessException;
}
|